Regarding an upcoming EU legislation on On-Board Weighing (OBW) equipment for commercial vehicles, our client wants to assess the possibility of accessing the market with a new product. New concepts are generated and prototypes are built and tested on ad-hoc developed benches and on demo vehicle.
The directive set out the goals in terms of system interoperability, compatibility, reliability and accuracy. The compatibility has to be addressed in case of vehicles with trailer units and the communication shall be based on DSRC standards such that the information is readable by competent authorities. Every 10 minutes the system is requested to deliver the total weight (and optionally the axle weight) with an accuracy of 5% of the GVW. This means that the information shall be available while in standing still condition or in-motion. Thus, the biggest challenge is to make the system independent from axle type (compatibility with others OEM product), suspension system type (leaf spring, air ride, active level control etc.) as well as vehicle and road condition (tire pressure, on-curb parking, asymmetric loads, longitudinal and lateral road grade, parking brake use etc.).
10 DoF test bench for vertical load solicitations